I think that two 1K tempcos in series will work OK. The x0xbox uses two 1K tempcos in series.
1K tempco + 1K metal film will not work for sure, as the temperature coeficient will be a lot lower than needed._________________Sebo
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I did build it and it gave exponential response and mediocre scaling was there, but not optimal, maybe due to other things? I don´t know, I guess the problem with the 47k is about the input impedance, maybe there´s some tiny voltage loss?

The difficulty might be the same cv would give different notes from different osc.s! {EDIT: check next post}

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